Posted on in Networking
In this case, gentlemen, size matters.
Yesterday, I calculated the average packet size for one of the networks I work on using data from 263986M (263,986,000,000+) packets.
Average packet size for that sample was 557 bytes.
Posted on in voice
Protocol Basics
Layer: Application
Transport: <acronym title="Transmission Control Protocol">TCP</acronym> or <acronym title="User Datagram Protocol">UDP</acronym>
Port(s): 5060, 5061
RFC(s): 2543, 3261
SIP is by far the most popular protocol used in VoIP communication today. SIP was designed as a …
Posted on in System Administration
If you have an interest in information security from a technical or managerial point of view, check out Principles of Information Security. It does an excellent job of presenting material for both audiences.
If you have other vendors you would like to see on this list, send me a message …
Posted on in Software
Somehow, I have let my Gmail inbox get totally out of control. I don't know if it was the holidays or what, but as of this morning, I had over 800 unread messages in my Gmail inbox. I decided a little while ago that it was time to focus on …
Posted on in Software
Importing Mozilla Firefox bookmarks into Safari on your Mac is really easy. Firefox stores its bookmarks in an HTML file that can be parsed by Safari. In Safari, simply click on the File menu and select Import Bookmarks. This will open a file selection dialog box. Firefox stores its bookmarks …
Posted on in System Administration
Previously, I mentioned that I was unable to remove the FAX= portion of the string produced by Cisco's $s$ (or $d$) macro in a T.37 store and forward fax configuration. That's still the case. I have found no way of doing this inside IOS. If it's possible, I've …
Posted on in Programming
If you get this error when trying to save something in the Django admin, it's probably because you forgot to synchronize the database after adding the admin application. If you are using a pre-1.2 version of Django, you can simply:
$ ./managy.py syncdb
Django 1.2 (which is currently …
Posted on in Software
Former Lotus Notes users may prefer to see unread messages in red rather than just bold. Microsoft Outlook uses two different views to display message lists to the user: Messages and Messages with AutoPreview. We will need to change the font color to red in both views to ensure that …
Posted on in voice
For about a month, I've had a problem with my Contacts app crashing on my T-Mobile G1. Whenever this would happen, I would be forced to close the Contacts application. This was a pretty major pain in the butt since I tend to use the Contacts and Favorites tab to …
Posted on in System Administration
I use screen for various purposes. It's nice to be able to sit down at a different terminal and attach to my same session, for example. I also occasionally run some long-term commands that will blow up if my session is disconnected. The one thing I need to do with …
Posted on in Programming
For some reason, sorting a dictionary by its keys seems to be one of the most frequently asked Python questions. I'm not sure if this is because it's just much easier to do in other languages, or if the semantics of the language just confuse new Python developers. I guess …
Posted on in Software
If you're like me, you abandoned non-free virtualization options in favor of
VirtualBox. I use VirtuaBox every day on my iMac in
order to perform Windows or Linux specific tasks. Since Sun
released VirtualBox 3 this summer,
they continued to improve the product. Check out the ChangeLog
to see what …
Posted on in voice
This information is contained in the documentation for the ATA, but I never have that handy when I need it. Here are the steps for performing a factory reset on a Sipura 2100 ATA:
Posted on in Information Systems
As new technology breakthroughs happen, there is always an enterprise willing to be an early adopter. Bleeding edge technology is hardware, software, or concepts that are new and untested. My enterprises choose to become early adopters in the hope of gaining a competitive advantage over their competitors. Two examples of …
Posted on in Information Systems
Due to their size, small businesses are often behind the curve when it comes to trends in information systems. Fortunately, their small size also imparts on them the ability to respond quickly when an opportunity presents itself. In today's rapidly changing marketplace, SMBs must be prepared to deploy decision support …
